Weight-motor.



G. C. ANDREWS & L. V. BARNES.

WElGHT MOTOR.

APPLICATION FILED MAR. 20. 1912.

1,16% 3, Patented Dec. 14, 1915.

2 SHEETS-SHEET 1.

d 51252? 0 K 4 Y COLUMBIA PLANOGRAPH (20., WASHINGTON, D. c.

e. c. ANDREW-S an. v. BARNES.

WEIGHT MOTOR.

APPLICATION FILED MAR. 20. l9l2.

1,1,83. Patented De0.14,1915.

I 5} 2 SHEETSTSHEET 2. m 6 1 1/ WW2 Fig- 5 l m; 26 y 40 45 6 M 339 $173 M 3 9: i/mp'r y COLUMBIA PLANOGRAPH co., WASHINGTON, D. c.

WTTE TAT@ PAENT GEORGE C. ANDREWS AND LINNIEAUS V. BARNES, 0F MINNEAPOLIS; MINNESUTA; SAID BARNES :ASSIGNOR TO SAID ANDREWS.

WEIGHT-MOTOR.

Application filed March 20, 1912.

T 0 all whom it m on concern.

Be it known that we, GEORGE C. ANDREWS and LINNIEAUS V. BARNES, citizens of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Weight-Motors; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention has for its particular object to provide an improved weight motor adapted for many diiferentuses, but especially adapted for use in connection with automatic heat regulators, whereby the motor is controlled by an electrothermostat.

Generally stated, the invention consists of the novel devices and combinations of devices, hereinafter described and defined in the claims. 7

In the accompanying drawings which illustrate the invention, likecharacters indicate like parts throughout the several views.

Referring to the drawings, Figure 1 is a view partly in elevation and partly in section showing the improved weight motor operativelv connected in a heat regulating system; Fig. 2 is a side elevation of the motor with some parts removed and with some parts broken away; Fig. 3 is a vertical section taken on the line 00 m? on Fig. 2; and Fig. 4 is a horizontal section takenon the line 00 00* on Fig. 2.

The numeral 1 indicates the floor structure of a. building, and the numeral 2 indicates a heater of the hot water and steam type, the said heater having a draft damper 3 and a check damper 4.

Most of the mechanism of the improved motor is contained within a suitable casing, preferably formed from stamped or pressed sheet metal, such as galvanized iron. This casing, as shown, is made up of a main section 5 and a detachable side section 6, suitablyconnectedand suitably secured to a top board 7, shown as supported' from the floor structure 1. Rigidly secured to the main case section 5 and bracing and stiffening thesame, is a U-shaped metal bearing 8, and a similar but inverted U-shaped metal bearing 9. A driving shaft 10 isjournaled in and extends through the prongsofthe bearing- 9 and the sides of" the case,andafiords Specification of Letters Patent.

Patented Dec. 11a, 1915.

Serial No. 684,927.

a crank shaft which, at its outer ends, is provided with crank arms 11, shown asin the form of rods passed diametrically through perforations in the ends of the saidshaft and held by set screws 12. The outer ends of the crank arms 11 are passed through crank heads 13 that are rigidly but adjustably secured thereon by machine screws 14 that afford the wrist pins of the cranks. Located Within the case and loosely journaled on the crank shaft 10 is a sheave or grooved wheel 2% that carries a springpressed driving pawl 16. The driving pawl 16 engages the teeth of a ratchet wheel 17, rigidly secured to the crank shaft 10,

' preferably as follows: A so-called stop arm in the form of a rod 18 is extended diametrically through a perforation in the shaft 10, through an insulating sleeve 19 on said shaft and through a metallic contact lug 20 projected laterally from the ratchet wheel 17. Both ends of the stop rod 18 project the same distance from the shaft 10.

The numerals 21 and 22indicate spring contact brushes secured to an insulating block 23 shown as fixed on'the-bearing 9. The contact lug 20 is alternately engageable with the brushes 21 and 22, and is grounded through the various metallioparts of the motor, includingthe shaft 10, bearing 9, and case 5.

Secured to the shaft 10 is a groovedworking or driving wheel or sheave 24. An operating cable 25 is passed over the wheel 2& and at one end is attached to a suitable anchor :26, shown as applied on the top plate 7 and, at its other end, is attached .to a suitable anchor, preferably in the form of a screw-eye 27 applied to the other end of the said top plate 7. As a convenient means affording a swivel connection between the cable 25 and'the said eye 27, said cable is provided with a knot 28 in its upper end and an ordinary washer 29 is interposed between the said knot and the said screweye. This swivel connection is especially important when the cable 25 is in the form of a rope or heavy twisted cord, inasmuchas it will permit the said cableto relieve itself from any abnormal twist, and hence, will prevent kinking of the cable.

The cable 25 is provided withtwo loops, on one of which, as, shown, a sheaveequipped contact block 30 is. suspended and on the other of which a similar sheave operating weight 32.

' relatively light weight 33 is attached to the contact block 31. The weight 32 is so much heavier than the weight 33 that it will raise the latter and afford the power necessary to operate the motor. In fact, the weight 33 is only to take up the slack of that portion of the cable which is lowered or drawn downward in .oroler to raise the main or For intermittently stopping and releasing the crank shaft 10 and driving wheel 24, we provide an escapement device of novel construction. This escapement device includes a so-called escapement wheel 34 having a shaft 35 journaled in the bearing 8. On its periphery, the wheel 34 is provided with a series, as shown, with four escapement stop lugs'36, and on itsface or hub, it is provided with an equal number of stop lugs or devices 37. The stop lugs 36 are located ninety degrees apart and the stops 37 are also located ninety degrees apart. The said stops 37 cooperate in succession with one or the other of the endsof the stop arm or rod v18 of the Working or crank shaft 10. When one of the stops 37 is engaged by one end of the stop rod 18, it intercepts the rotary movement of the shaft 10 and wheel 24, and the force of the weight 32 tends to rotate the escapement wheel 34 in the direction of the arrow marked thereon, in Fig. 2. Movements of the said escapement wheel in the direction indicated are normally prevented, however, by an escapement dog 38 that is preferably directly secured to an armature 539 pivoted at its upper end to a bearing 40, .shown as secured to the case'section 5. The

lower end of the escapement dog 38 normally. engages one of the stop lugs 36 of the wheel 34, and hence, prevents rotation of the escapement wheel 34, driving wheel 24 and shaft 10. At this time, of course, the

weight 32 is held against downward movement.

The escapement dog 38 is provided with a projecting arm 41, the end of which is so located that it will be engaged by the lug 36 just previously released, and the said lug acting thereon, will positively retract the armature 39 to positively force the escapement dog 38 into engagement with the next vlug 36, which follows the said released lug armature 39 toward the left, in respect to Fig. 2, and positively releases the escapement dog 38 from the engaged lug 36 of the escapement wheel. Preferably, a light leaf aspring 43 applied to the armature 39 acts against one of the poles of the magnet 42 and exerts a force which tends to hold the said armature in a retracted position, and the escapement dog 38 in an operative position. However, the spring 43 is not essential as the said armature will be positively retracted and the said escapement dog positively returned to an operative position to intercept the next following lug 36 of the escapement wheel by the positive camming action of the lug 36, just released, as before stated.

The escapement device, above described, operates with a great certainty and under a minimum of friction. lVhen the escapement wheel is released, it is rotated under very light friction, and the engaged stop 37 simply drops out of engagement with the end of'the stop rod 18. The next following stop 37 then simply rotates into position to engage the other end of the said stop rod and intercept further movement of the shaft 10.

and, at its lower end, is provided with an eye 48, through which the cable 25 is passed. The said cable 25 is provided with a tripping lug 'or element 49 which, when the motor has run down, as above stated, engages the eye 48 of the rod 47, throws the same downward and moves the contact lever 46 downward out of engagement with the contact 45 and thereby breaks the battery circuit. This prevents wasting of the battery while the motor is run down.

In Fig. 1, the numeral 50 indicates a light cable which connects the damper 3 to the wrist pin 14 and one of the cranks of the Working shaft 10, and the numeral 51 indicates a similar cable which connects the other wrist pin of the said shaft to the check damper 4. As shown, the cables 50 and 51, respectively, run over guide sheaves 52 and 53 supported from the ceiling 1. As is evident, under successive half rotations of the shaft 10, the dampers 3 and 4 will be alternately opened and closed in reverse order, this being the customary arrangement in the application of thermostats to hot water and steam boilers and hot air furnaces.

The numeral 54 graphically indicates a thermostat having the usual three contacts 55, 56, and 57. This thermostat constitutes no part of the present invention, and hence, I

need not be further described except to trace, generally, the electrical connections between the contacts thereof and certain parts of the motor. Wires 58, 59 and 60 lead, respectively, from the said contacts 55, 56 and 57. The wires 58 and 59 connect, respectively, to the brush contacts 21 and 22, and the wire 60 leads to the fixed contact 44. The battery shown as made up of two dry cells 61, is connected to the wire 60. A wire 62 leads from the contact 45 to one terminal of the coil of the electro-magnet 42, the other terminal of the said magnet coil being connected to the metallic case 5, by a short wire 68, or otherwise. It will now be remembered that the contact lug 20 of the ratchet wheel 17 is in electrical connection with themetal portion of the motor including the said case 5, and hence, is in electrical connection with one terminal of the coil or magnet 42. Hence, it is evident that by the alternate engagement of the contact lug 20 with the contacts 21 and 22, and by the alternate engagement of the contact 57 of the thermostat with the cooperating contacts 55 and 56, the said electro-magnet 42 will be energized and caused to release the escapement dog 38 from the escapement Wheel 34 in the proper manner to automatically control the regulation of the heat in the room or apartment where the thermostat is installed.

To wind up the weight of the motor, it is only necessary to draw on the weight 33 or to pull down the top of the cable 25 to which it is applied. This will, of course, raise the weight 32 and will rotate the wheel 24: backward, under which backward rotation the dog 16 simply slips over the teeth of the ratchet wheel 17 allowing the said ratchet wheel and the crank or working shaft 10 to remain stationary while the motor is being wound up.

What we claim is:

1. The combination with a power driven rotary member movable in the constant direction, having a projecting stop arm, a rotary escapement element having a plurality of circumferentially spaced stops, with which the stop arm of said power driven working member is engageable in succession, the said escapement element being movable in the constant direction of the rotating force applied thereto by the stop arm of said working member, a temperature actuated means controlling the movements of said escapement element, and temperature controlling devices controlled by said mechanism.

2. The combination with a power driven rotary member movable in the constant direction, having a projecting stop arm, of an escapement wheel, having a plurality of circumferentially spaced arm stops with which the arm of said working member is engageable in succession, said escapement wheel be ing movable in the constant direction of the force applied thereto by the stop arm of said working member, and an electromagnetic escapement device, including a thermostat, contacts controlled by movements of said working member for intermittently stopping and releasing said escapement wheel, and temperature controlling devices controlled by said power driven rotary memher.

3. The combination with a power driven working member having a projecting stop arm, of an escapement wheel having a plurality of arm stops and escapement stops, equal in number, and with which arm stops the arm on said working member is engageable in succession, an escapement dog engageable in succession with said escapement stops, an armature connected to move said escapement dog, an electromagnet operative on said armature to release said escapement dog, said escapement dog having an arm arranged to be engaged by the last released escapement dog, to positively force said es capement dog into engagement with the next following escapement dog, a controlling circuit for said magnet including a thermostat, and temperature controlling devices controlled by said power-driven rotary member.

4:. The combination with a power driven working member having a projecting stop arm, of an escapement wheel having a plurality of arm stops and escapement stops, equal in number, and with which arm stops the arm on said working member is engageable in succession, an escapement dog engageable in succession with said escapement stops, an armature connected to move said escapement dog, an electromagnet operative on said armature to release said escapement dog, said escapement dog having an arm arranged to be engaged by the last released escapement dog, to positively force said escapement dog into engagement with the next following escapement dog, a controlling circuit for said magnet including a thermostat and an automatic circuit maker and breaker, the latter being operated by movements of said working member, the said escapement wheel being arranged to rotate in the direction of the pressure applied thereto by the arm of said working member, and temperature controlling devices controlled by said power-driven rotary member.

In testimony whereof we aiiiX our signatures in presence of two witnesses.

GEORGE C. ANDREWS. LINNIEAUS V. BARNES.

Witnesses:

HARRY D. Krnoonn, F. D. MERCHANT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

